Block API : cache

[Rahe]

Implement a cache for the rendered template in front for ACF/Dynamic blocs.

For now, the Dynamics blocs are rendered on every load in the backend and in the frontend, to speed up the process it's not usefull to render this everytime.

Before sending the template :

		$template = Helpers::locate_template( $tpl_slug );
		if ( empty( $template ) ) {
			return;
		}
		$filetime = filemtime( $template );
		$content = wp_cache_get( $this->cache_key( $slug,$post_id,$block_data, $filetime ), 'bea-plugin-boilerplate-blocks', false, $found );
		if ( $found === true ) {
			echo $content;
			return;
		}

And then if rendered

wp_cache_set( $this->cache_key( $render, $filetime ), $content, 'bea-plugin-boilerplate-blocks' );

The cache_key method

	private function cache_key($slug,$post_id,$block_data, $filetime ) {
		return $filetime.':'.$slug . ':' . $post_id. ':' . md5( serialize( $block_Data) ) ) . ':' . wp_cache_get_last_changed( 'posts' );
	}